How much does the earth weigh? :   measurement & mass. 

 - Evanston, IL :  AGC Educational Media,  1995. 
 -  1 videodisc (VCD) (15 min) : sd., col. ; 4 3/4 in.  Science fact & fun 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>VCD 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil physics--Juvenile films<br/>Soils--Composition--Juvenile films<br/>Soil physics<br/>Soils--Composition
<br/><br/><label>LC Class. No.: </label>631.43 H83 c1995